2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
N-Channel JFETs
2N4856JAN
2N4857JAN
2N4858JAN
2N4859JAN
2N4860JAN
2N4861JAN
2N4856JANTX
2N4857JANTX
2N4858JANTX
2N4859JANTX
2N4860JANTX
2N4861JANTX
2N4856JANTXV
2N4857JANTXV
2N4858JANTXV
2N4859JANTXV
2N4860JANTXV
2N4861JANTXV
PRODUCT SUMMARY
Part Number
2N4856
2N4857
2N4858
2N4859
2N4860
2N4861
V
GS(off)
(V)
–4 to –10
–2 to –6
–0.8 to –4
–4 to –10
–2 to –6
–0.8 to –4
V
(BR)GSS
Min (V)
–40
–40
–40
–30
–30
–30
r
DS(on)
Max (W)
25
40
60
25
40
60
I
D(off)
Max (pA)
250
250
250
250
250
250
t
ON
Typ (ns)
9
10
20
9
10
20
FEATURES
D
D
D
D
D
D
Low On-Resistance: 2N4856 <25
W
Fast Switching—t
ON
: 4 ns
High Off-Isolation—I
D(off)
: 5 pA
Low Capacitance: 3 pF
Low Insertion Loss
N-Channel Majority Carrier FET
BENEFITS
D
D
D
D
D
D
Low Error Voltage
High-Speed Analog Circuit Performance
Negligible “Off-Error,” Excellent Accuracy
Good Frequency Response, Low Glitches
Eliminates Additional Buffering
High Radiation Tolerance
APPLICATIONS
D
D
D
D
D
Analog Switches
Choppers
Sample-and-Hold
Normally “On” Switches
Current Limiters
DESCRIPTION
The 2N4856JAN/JANTX/JANTXV all-purpose JFET analog
switches offer low on-resistance, low capacitance, good
isolation, and fast switching.
Hermetically-sealed TO-206AA (TO-18) packaging allows full
military processing (see Military Information). For similar
products in TO-226AA (TO-92) and TO-236 (SOT-23)
packages, see the J/SST111 series data sheet. For similar
duals, see the 2N5564/5565/5566 data sheet.
TO-206AA
(TO-18)
S
1
2
D
3
G and Case
Top View
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
www.vishay.com
7-1
2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Gate-Drain, Gate-Source Voltage :
(2N4856-58) . . . . . . . . . . . . . . . . . . . . . . . –40 V
(2N4859-61) . . . . . . . . . . . . . . . . . . . . . . . –30 V
Gate Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Lead Temperature (
1
/
16
” from case for 10 seconds) . . . . . . . . . . . . . . 300
_C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65 to 200_C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . –65 to 200_C
Power Dissipation
a
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1800 mW
Notes
a. Derate 10.3 mW/_C to T
C
> 25_C
SPECIFICATIONS FOR 2N4856, 2N4857 AND 2N4858 (T
A
= 25_C UNLESS NOTED)
Limits
2N4856
2N4857
2N4858
Parameter
Static
Gate-Source
Breakdown Voltage
Gate-Source Cutoff Voltage
Saturation Drain Current
b
Gate Reverse Current
Gate Operating Current
c
Drain Cutoff Current
Symbol
Test Conditions
Typ
a
Min
Max
Min
Max
Min
Max
Unit
V
(BR)GSS
V
GS(off)
I
DSS
I
GSS
I
G
I
D(off)
I
G
= –1
mA
, V
DS
= 0 V
V
DS
= 15 V, I
D
= 0.5 nA
V
DS
= 15 V, V
GS
= 0 V
V
GS
= –20 V, V
DS
= 0 V
T
A
= 150_C
V
DG
= 15 V, I
D
= 10 mA
V
DS
= 15 V, V
GS
= –10 V
T
A
= 150_C
I
D
= 5 mA
–55
–40
–4
50
–10
175
–250
–500
–40
–2
20
–6
100
–250
–500
–40
V
–0.8
8
–4
80
–250
–500
mA
pA
nA
pA
nA
–5
–13
–5
5
13
0.25
0.35
0.5
250
500
250
500
250
500
0.5
Drain-Source On-Voltage
V
DS(on)
V
GS
= 0 V
I
D
= 10 mA
I
D
= 20 mA
0.5
0.75
25
40
60
V
Drain-Source On-Resistance
c
Gate-Source
Forward Voltage
c
r
DS(on)
V
GS(F)
V
GS
= 0 V, I
D
= 1 mA
I
G
= 1 mA , V
DS
= 0 V
0.7
W
V
Dynamic
Common-Source
Forward Transconductance
c
Common-Source
Output Conductance
c
Common-Source
Input Capacitance
Common-Source
Reverse Transfer Capacitance
Equivalent Input
Noise Voltage
c
g
fs
g
os
C
iss
C
rss
e
n
V
DS
= 0 V, V
GS
= –10 V
f = 1 MHz
V
DG
= 20 V, I
D
= 1 mA
f = 1 kHz
6
25
7
3
3
18
8
18
8
18
pF
8
nV⁄
√Hz
mS
mS
V
DG
= 10 V, I
D
= 10 mA
f = 1 kHz
Switching
t
d(on)
Turn-On Time
Turn-Off Time
t
r
t
OFF
V
DD
= 10 V, V
GS(H)
= 0 V
See Switching Circuit
2
2
13
6
3
25
6
4
50
10
10
100
ns
www.vishay.com
7-2
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
SPECIFICATIONS FOR 2N4859, 2N4860 AND 2N4861 (T
A
= 25_C UNLESS NOTED)
Limits
2N4859
2N4860
2N4861
Parameter
Static
Gate-Source
Breakdown Voltage
Gate-Source Cutoff Voltage
Saturation Drain Current
b
Gate Reverse Current
Gate Operating Current
c
Drain Cutoff Current
Symbol
Test Conditions
Typ
a
Min
Max
Min
Max
Min
Max
Unit
V
(BR)GSS
V
GS(off)
I
DSS
I
GSS
I
G
I
D(off)
I
G
= –1
mA
, V
DS
= 0 V
V
DS
= 15 V, I
D
= 0.5 nA
V
DS
= 15 V, V
GS
= 0 V
V
GS
= –15 V, V
DS
= 0 V
T
A
= 150_C
V
DG
= 15 V, I
D
= 10 mA
V
DS
= 15 V, V
GS
= –10 V
T
A
= 150_C
I
D
= 5 mA
–55
–30
–4
50
–10
175
–250
–500
–30
–2
20
–6
100
–250
–500
–30
V
–0.8
8
–4
80
–250
–500
mA
pA
nA
pA
nA
–5
–13
–5
5
13
0.25
0.35
0.5
250
500
250
500
250
500
0.5
Drain-Source On-Voltage
V
DS(on)
V
GS
= 0 V
I
D
= 10 mA
I
D
= 20 mA
0.5
0.75
25
40
60
V
Drain-Source On-Resistance
Gate-Source Forward Voltage
r
DS(on)
V
GS(F)
V
GS
= 0 V, I
D
= 1 mA
I
G
= 1 mA , V
DS
= 0 V
0.7
W
V
Dynamic
Common-Source
Forward Transconductance
c
Common-Source
Output Conductance
c
Common-Source
Input Capacitance
Common-Source
Reverse Transfer Capacitance
Equivalent Input
Noise Voltage
c
g
fs
g
os
C
iss
C
rss
e
n
V
DS
= 0 V, V
GS
= –10 V
f = 1 MHz
V
DG
= 20 V, I
D
= 1 mA
f = 1 kHz
6
25
7
3
3
18
8
18
8
18
pF
8
nV⁄
√Hz
mS
mS
V
DG
= 10 V, I
D
= 10 mA
f = 1 kHz
Switching
t
d(on)
Turn-On Time
Turn-Off Time
t
r
t
OFF
V
DD
= 10 V, V
GS(H)
= 0 V
See Switching Circuit
2
2
19
6
3
25
6
4
50
10
10
100
NCB
ns
Notes
a. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
b. Pulse test: PW
v100
ms
duty cycle
v10%.
c. This parameter not registered with JEDEC.
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
www.vishay.com
7-3
2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
SWITCHING TIME TEST CIRCUIT
4856/4859
V
GS(L)
R
L
*
I
D(on)
*Non-inductive
–10 V
464
W
20 mA
4857/4860
–6 V
953
W
10 mA
4858/4861
–4 V
1910
W
5 mA
INPUT PULSE
Rise Time < 1 ns
Fall Time < 1 ns
Pulse Width 100 ns
PRF 1 MHz
SAMPLING SCOPE
Rise Time 0.4 ns
Input Resistance 10 MW
Input Capacitance 1.5 pF
INPUT
V
IN
t
OFF
10%
OUTPUT
t
d(on)
90%
t
r
t
r
<20 ns
t
f
<20 ns
V
DD
R
L
OUT
V
GS(H)
V
GS(L)
51
Ω
1 kΩ
V
IN
Scope
51
Ω
www.vishay.com
7-4
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
嵌入式系统
